V5.20.14 early access build

[John Mulcahy]

Yes, it is, also mentioned in the help. Some folk use the reference channel for things other than timing.

 

[Lowclock]

Fair enough! I usually use an acoustic timing reference so I've never left it on to notice it before. I wonder if it would be a good idea to have a checkbox in the generator window for it or something since it kind of invalidates the channel selection box in there.

 

[John Mulcahy]

Makes sense.

 

[boxerfan88]

Hi John,

I found some trouble with the latest build 5_20_14ea47.

When I import sweep recordings, the distortion graph is all greyed out.

It does not happen with 5_20_14ea39.

 

[onlyoneme]

Isn't it a result of this setting?

 

[John Mulcahy]

Isn't it a result of this setting?

View attachment 60658

Exactly, from this change in ea40:

Added: Noise floor data is extracted from imported sweep measurements if there is sufficient data before the timing reference

 

[G29]

Hey John,

I would like to throw in a feature request to your existing pile.

Would like to be able to display a 3 and 4-way XO/individual driver measurements in the Waterfall plot in a similar way as the existing 2-way functionality operates. It may put a burden on processor requirements for resizing/positioning though. Much appreciated if possible.

Thanks much.

 

[John Mulcahy]

I don't understand what you are after there, can you elaborate?

 

[G29]

I don't understand what you are after there, can you elaborate?

Sure, simultaneously being able to display 4 items (4 XO filters, 4/SubLowMidHigh driver measurements, etc.) in a Waterfall plot versus just 1 or 2. Same functionality, just increase the number of plots from 2 to 4.

 

[John Mulcahy]

Can't recall seeing more than one driver on a waterfall plot. Presumably it would be helpful for design in some way? What is the benefit?

 

[G29]

Can't recall seeing more than one driver on a waterfall plot. Presumably it would be helpful for design in some way? What is the benefit?

I use it to visualize a 2-way, 3-way, 4-way XO speaker and them compare it against their actual measurements.

I make FIR XO's in RePhase and then analyze them in REW before applying them to the actual system. I can inspect all 4 in 2D plots, but not 3D Waterfall plots unless I pre-composite them with aritmetic functions first and lose all of the XO overlap details.

 

[sm52]

G29​

have you seen this somewhere? Several waterfall graphs in one picture? I think it will be porridge.

 

[G29]

G29​

have you seen this somewhere? Several waterfall graphs in one picture? I think it will be porridge.

I do it all the time with 2 adjacent drivers or XO FIRs, thus the request to do it with a 3 or 4 way speaker design for a complete view of the entire speaker.

With shallow slopes, you can analyze the overlap of more than 2 drivers.

To address yours specific question if I have seen it somewhere.

Comparing 3D solids modeling to sound may not be an apples-2-apples comparison, but ... If you are designing a V-4, V-6 or V-8 in CAD software, it usually doesn't restrict you to 3D viewing of just 1 or 2 cylinders at a time, but allows you to view the entire engine if desired in 3D. Drivers are motors right ? =)

 

[boxerfan88]

Exactly, from this change in ea40:

Added: Noise floor data is extracted from imported sweep measurements if there is sufficient data before the timing reference

Isn't it a result of this setting?

View attachment 60658

Thank you. I overlooked the new feature.

 

[sm52]

G29​

This is interesting. I didn't know about this possibility. Thank you for the clarification.

 

[G29]

@sm52

Sorry I wasn't more clear. It took me a while to understand your usage of the term "porridge" because I was thinking horizontal distribution and not overlays for this use case. I was not suggesting 4 overlays occupying the same X/Y/Z space because as you put it, it would be "porridge". =)

 

[sm52]

I was not suggesting 4 overlays occupying the same X/Y/Z space

Now I don't understand what you meant. Now you can watch the waterfall of the main measurement and overlay. Your wish is to watch + a few other overlays? No?

 

[G29]

Now I don't understand what you meant. Now you can watch the waterfall of the main measurement and overlay. Your wish is to watch + a few other overlays? No?

I meant displaying 4 items at different X offsets (x1=sub freq range, x2=bass freq range, x3=mid freq range, x4=high freq range) so basically expanding the following to 3 or 4 horizontally
.

versus 4 of these occupying the same x1, y1, z1 location (porridge).

Hope that is more clear.

 

[sm52]

So?

 

[serko70]

minor bug report: predicted GD graph in EQ window loses smoothing when a new filter is manually added!

 

[John Mulcahy]

Thanks, fixed for the next build.

 

[G29]

So?

Yep, display the entire speaker.

 

[G29]

Y-Axis display issue.

Sometimes the bottom (low frequency range) of the Spectrogram displays blank space instead of the plot.

This plot shows the bottom is blank below @ 48Hz.

UPDATE: The bottom of the plot is tied to the After Peak Span settings so this may be as designed.

 

[John Mulcahy]

The minimum frequency for the plot is determined by the after peak span.

 

[John Mulcahy]

Builds updated today with these changes:

• Added: The RTA distortion settings have a control for the highest harmonic to include in the calculated THD figure
• Added: Averaging measurements averages their distortion data if they cover the same frequency range at the same resolution
• Added: There is now a help menu entry to generate a diagnostic file that zips REW's log files and a soundcard debug file
• Changed: When the distortion graph Y axis is dBr show the equivalent major percentage figures on the right hand side
• Changed: Added a checkbox in the generator playback panel to choose whether the signal should also be sent to the timing reference output (previously it went to the timing reference output whenever a timing reference measurement mode was selected). This setting does not affect sweep measurements, only the generator behaviour when not measuring.
• Changed: RTA THD figure shows which harmonics are included
• Fixed: X axis zoom buttons could stop working at very high time axis zooms
• Fixed: RTA distortion panel text did not update when distortion settings changed if the RTA was not running
• Fixed: Distortion graph THD subscript for harmonics showed the chosen calculation limit even if there were fewer harmonics available
• Fixed: Predicted group delay smoothing did not match measurement when filters changed